inquiry math

my first example is the San Francisco Bay Bridge:

The San Francisco Bay Bridge is 4.46 miles, or 282 585 600 000 micro inches long. which is also
 7 849.6 yards long.


my second example is The Lake Pontchartrain bridge in Louisiana:
 it is 126,024 feet long, or
 7.956 044 621 6 leagues long, which is also 3 miles long (a league is a unit of measurement that used refers to how far a horse could walk in an hour but since then other countries have specified how long it actually is) The lake Pontchartrain bridge cost $51,000,000 to build which is 352410000.0000 Bolivian bolivianos


my third, and last example is the Si-o-se pol bridge in Iran.
it is 297.76 meters long which is  0.000000298 gigameters which is also 297760000 microns.